Registering a domain name and hosting one is sometimes mistaken by a lot of people to be the same thing. They are in fact two separate services - the domain address registration is the actual name and nothing else, while the hosted domains feature shows the amount of already registered domain names which you can accommodate within the same web hosting account and have site files and e-mails for them. Your sites will work in precisely the same way no matter if the domain names are registered and hosted in one place or are registered with company A and pointed to company B. Simply registering a domain without hosting it will give you ownership, but will not allow you to have a web site unless you host this domain name in some account so that records for it are created and it starts opening the data from that account.